On the Map, we make a drawing or measuring tool available. The measuring tool can be helpful in determining how far away a storm is or other weather phenomenon. The drawing tool can be useful if you wish to highlight certain weather situations and then share a screenshot of that content to friends via email or on social media platforms like facebook and twitter.
On the iPhone, these tools are available when viewing the full screen map.
If you would like to hide these tools and have more map space, you can do so by tapping on the map layers button in the bottom right of the map, then tapping on the Map Options tab at the top, then turning off Drawing and Measuring Tools.